Optimize media adding

[giolaza]

Hello, sorry if it will be little stupid but:

1 - When I am adding video file(or image) and want to create thumb for that, I am using addMediaConversion method in model that means:

File is uploaded to backend server(php tmp folder), then it's uploading to Amazon S3, than downloading and creating thumb for that.

Is it possible to made all conversions before file will be moved to S3 server?

2 - Media move or copy methods -
$media->move($post,'default','s3')
To prevent double downloads I decided to use ->toMediaCollection('default','local') then use move method when all conversions are completed, but copy (and move too) method doesn't copy all data regarding media. it's copy just original file and all addMediaConversion methods are started again.

What I am doing wrong? maybe I did not read documentation good and missed some methods?